Code:
#include iostream
#include conio.h
using namespace std;
void max_heapify(int *a, int i, int n)
{
int j, temp;
temp = a[i];
j = 2 * i;
while (j <= n)
{
if (j < n && a[j+1] > a[j])
j = j + 1;
if (temp > a[j])
break;
else if (temp <= a[j])
{
a[j / 2] = a[j];
j = 2 * j;
}
}
a[j/2] = temp;
return;
}
void build_maxheap(int *a,int n)
{
int i;
for(i = n/2; i >= 1; i--)
{
max_heapify(a,i,n);
}
}
int main()
{
int n, i, x;
cout<<"enter no of elements of array\n";
cin>>n;
int a[20];
for (i = 1; i <= n; i++)
{
cout<<"enter element"<<(i)<
cin>>a[i];
}
build_maxheap(a,n);
cout<<"Max Heap\n";
for (i = 1; i <= n; i++)
{
cout<
}
getch();
}
Output:
enter no of elements of array
7
enter element1
5
enter element2
9
enter element3
6
enter element4
7
enter element5
1
enter element6
3
enter element7
8
Max Heap
9
7
8
5
1
3
6
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